RE: Import speed falls off at 2million rows

From: Allen, Brandon <>
Date: Thu, 12 Mar 2009 10:09:16 -0700
Message-ID: <64BAF54438380142A0BF94A23224A31E1122F65450_at_ONEWS06.oneneck.corp>

Maybe it's not a problem with import, but a problem with your I/O performance? I suspect maybe you're writing to a RAID5 device and it's fast until you fill up the cache and then you hit the hideous reality of the RAID5 write penalty.

Take a look at "iostat -dx" or "sar -d" while the import is running to see if your disk service/wait times increase significantly when you see the import slow down.


-----Original Message-----

From: [] On Behalf Of David Cheyne

Redo logs are now 1gb each and there are 5 groups. All data is on netapp.

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-- Received on Thu Mar 12 2009 - 12:09:16 CDT

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